| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.jclouds.blobstore.binders; |
| |
| import static com.google.common.base.Preconditions.checkArgument; |
| import static com.google.common.base.Preconditions.checkNotNull; |
| import static org.jclouds.blobstore.reference.BlobStoreConstants.PROPERTY_USER_METADATA_PREFIX; |
| |
| import java.util.Map; |
| |
| import javax.inject.Inject; |
| import javax.inject.Named; |
| import javax.inject.Singleton; |
| |
| import org.jclouds.http.HttpRequest; |
| import org.jclouds.rest.Binder; |
| import org.jclouds.util.Maps2; |
| |
| import com.google.common.base.Function; |
| import com.google.common.collect.Multimaps; |
| |
| @Singleton |
| public class BindMapToHeadersWithPrefix implements Binder { |
| private final Function<String, String> fn; |
| |
| @Inject |
| public BindMapToHeadersWithPrefix(@Named(PROPERTY_USER_METADATA_PREFIX) final String metadataPrefix) { |
| checkNotNull(metadataPrefix, PROPERTY_USER_METADATA_PREFIX); |
| fn = new Function<String, String>() { |
| |
| @Override |
| public String apply(String arg0) { |
| String inLowercase = arg0.toLowerCase(); |
| return (inLowercase.startsWith(metadataPrefix)) ? inLowercase : metadataPrefix + inLowercase; |
| } |
| |
| @Override |
| public String toString() { |
| return "prefix: " + metadataPrefix; |
| } |
| |
| }; |
| |
| } |
| |
| @SuppressWarnings("unchecked") |
| @Override |
| public <R extends HttpRequest> R bindToRequest(R request, Object input) { |
| checkArgument(checkNotNull(input, "input") instanceof Map<?, ?>, "this binder is only valid for Maps!"); |
| checkNotNull(request, "request"); |
| |
| Map<String, String> userMetadata = Maps2.transformKeys((Map<String, String>) input, fn); |
| return (R) request.toBuilder().replaceHeaders(Multimaps.forMap(userMetadata)).build(); |
| } |
| |
| } |